Speed-changing mechanism.



PALIENTBD .TUNE '18, 1907- G D. MUNsING, SPEED CHANGING MEGHANISM.

2 SHEETS-SHEET L APPLICATION vIILSJD AP. 4. 1907.

E F: SE N www E imm mm om :E @INNN 5 wn PATENTED JUNE 1s, 1907.

lNo. 857,476.'

G D. MUNSINGW SPEED CHANGING MECHANISM..

APPLICATION FILED APR. 4. 1907` BSHEETS-'SHEET 2.

UNITED sTATEs PATENT OFFICE.

GEORGE D. MUNS'ING, OF NEW YORK, N. Y. i sPElE'D-ci-IANGING mEoHANlsM.

Patented June 18, 1907.

Application filed April4,190'7. Serial No. 366,339.

To all whom it may concern:

Be it known that I, GEORGE D.`MUNs1NG, a citizen of the United States, residing at New York, in the county and State of New York, United States of America, have invented certain new and useful Improvements in Speed-Changing Mechanism and I gaged by a brake strap 1 1.

do hereb declare the following to be a full, clear, an exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters o r figures-f reference marked thereon, which form a part of this specification. g g

My invention relates to transmission mechanism and more particularly to that class of mechanism 4included. between the of one end of shaft 3 is a recess for the reception of a thrust bearing plate 5,.a bushing 6 and a reduced end 7 of the driven shaft 8. Loose on the end of the driven shaft and having end bearing against the gear wheel 4 is a loose member or brake wheel 9 provided on its outer periphery with a braking face 10 en,- This brake strap is held at one end, Fig. 2, by a screw 12 in the bracket 13 formed on the casing 14. Passing through the casing and bracket is a shaft 15 having an arm 16 on which rests the free end of the brake strap 11, said free end having fixed thereto a guide pin 1-7 which is slidable ina hole in the fixed end of the strap, thereby reventing lateral movement of the free end Acpluring the movement of the arm 16 and rei venting the free end from slip ping out o its position, `said arm and its s aft 15 being moved by a lever 18. The brake wheel or spider 9 has journaled in it shafts 19 symmetrically distributed around the center of the spider and Il have here shown two .Such shafts. On one side 0f `the, spider and ke ed or otherwise secured on the ends of the s afts-19 are dgivenpinions 2O that gearwith and are driven by the gear wheel 4 on the driving shaft and on the opposite ends of shafts 19 are keyed planet gear wheels 21v and planet pinions 22. The gear wheels 21 and pinions 22 are herein shown made in one piece but it is ob vious that they lmay be made separately and keyed or otherwise secured on the ends of shafts 19.

The lanet gear wheels 2l mesh with the gear w eel 23, which has an elongated boss or sleeve 24. rlfhis gear wheel and sleeve are free to rotate on the driven shaft 8. The sleeve 24 is provided with suitable ,feathers 2,5 and on the elongated boss 24 are suitably mounted friction plates 26 heldagainst rotation thereon by feathers and limited in their sliding movement on the boss toward the gear wheel 2'3 by a stop plate 27 fixed to the boss or gear wheel as desired.

Slidably mounted on the driven shaft 8 yby means of the feather 28 is an internal gear 29 whose toothed rim is engaged by the planet pinions 22 and between the toothed rim and the web of this gear are included the friction plates, said web having ins 30 fixed therein, preferably four in num er. On these pins are mounted complementa 31 which alternate with the iction plates'26 already described. f

Mounted loose onthe boss of the internal gear wheel 29 is a flan ed sleeve 32 held in. place on said boss by ook rin v33 and between the end of said sleeve an the internal gear is a ball bearing 34 designed` to take the end thrust of said sleeve. case 14 on a shaft 35 is a fork 36 takin against the flange of sleeve`32, said fork an its shaft 35 being operated by a lever 37, the levers 37 and 18 bein connected by an ad- `ustable rod 38 pivote to their ends and the lever 18 is connected by an adjustable rod 39 to the foot-lever`40 or other form of operating friction platesl v Pivoted in the lever, retracted by a spring 41 and operating over a rack 42, said foot lever and rack being of any deslred or convement construction.

roo

The operation is as follows: When they lever 40 is at the point a of the rack 42 the engine runs idle, the friction plates 26 and 31 being disengaged and.y the rake band l1 being loose, permits the gear wheel 4 on the driven IOS.

shaft 3 to rotate pinions 20, shaft 19 and the ,I

s -tight and is adapted to be filled witholl.

tates shaft 35, fork 36 and forces the internal gear 29 alon the driven shaft compressing the disks an causing friction between them thus tending to lock the internal gear 29 and `gear wheel 23 to ether to retard the rotation of the gear whee 23. The member 23 being no longer freely revoluble on the driven shaft 8 will act en planet gear wheels 21 to-retard the rotation of the s ider 9 and the planet fpinions 22 will drive t e internal gear 29 at a tion plates and allow the parts 29, 23, 25 to move independently of one another, the brake band 11 being then applied to tend to hold the brake wheel 9 stationary, this will cause a reversal of movement, the speed of reverse movement depending on the slip be.- tween the brake Wheel and the brake band,

l In all cases the driving shaft and engine are operat'in'0r at full speed. The casing 14 is I claim 1. In a mechanism suchas described, the combination with a drivin shaft, a gear wheelthereon, a brake whee planet pinlons carried by the brake wheel and meshing with said gear wheel, a driven shaft, a ear Wheel loose thereon, an .internal gear s idable on the driven shaft, planet wheels driven by the aforesaid planet pinions driving the gear wheel loose on the driven shaft, planet pinions adjacent the aforesaid planet gear wheels gearing with the internal gear Wheel and means between the internal gear wheel and the gear Wheel on the driven shaft to frictionally control their relative rotation.

.2. In mechanism such as-described, lthe combination with a driving shaft and toothed element thereon; of a driven shaft, an internal gear wheel slidable on the driven shaft and-a member loose on the driven shaft, planet gearing carried by said member thereby gearing the toothed element to the internal gear wheel and meansY includ-ing vfriction mechanism operated by the sliding movement of the internal gear wheel to-frictionally retard the planet gearing and control the revolution of' the ,internal ear Wheel and driven shaft vin accordance with the degree of friction.

3. In mechanism such as described, the combination-with alined driving and driven shafts, an externally toothed member on one shaft and an internally toothed axially slidable member on the other shaft, an intermediate member between them free to rot'ate, planet gear wheels mounted onsaid intermediate member and Gearing with both the externally .and interna 'y toothed members, and means includin friction mechanism operated by the axia movement of the internally toothed member to cause said planet gear Wheels to impart differential rotation between the extern ally and internally toothed members depending upon theslip in the friction mechanism.

4. In mechanism such as described, the combination with driving and driven shafts, an externally toothed member on one shaft and an internally toothed axially slidable member on the other shaft, anintermediate member between them free to rotate, planet gear wheelsmounted on said intermediate member and gearin with both the externally and internal y toothed members; means including friction mechanism operated by the axial movement of the internally'toothed member to cause said planet gear wheels to impart differential rotation between the externally and internally toothed members andmeans brought into operation when the friction mechanism is released to reverse the direction of rotation of the internally toothed member. g

5. In mechanism such as described, the combination with alined drivin vand driven shafts; of an externally toothe member on one .shaft and an internally toothed, axially slidable member on the other shaft, an intermediate brake member between them free to rotate, planet gear Wheels mounted on the brake member and gearing with the other two members, and a brake bandto control the rotation of the brake member.

6. In mechanism such as described, the combination with alined drivin@ and driven shafts; of an externally toothed member on one of the shafts and an internally toothed axially slidable member on the other, a brake member between the aforesaid mem-- bers free to rotate lon one of the shafts, short shafts mounted to rotate in the brake member, planet wheels on the shafts driven by the externally toothed member and planet wheels and planet pinions on s'aid short shafts, the pinions gearing with the internally toothed member, a loose gear lwheel on one of the shafts meshing with the gear wheel on the short shafts, friction plates slidable but not rotatable onthe loose gear wheel, alternate friction plates slidable in and movable with the internally toothed member, a brake band for the brake meinber and connectedl simultaneously movable levers one for axially moving the internal toothed member and the other for operating the brake band.

7. In mechanism such as described the combination with driving and driven shafts; of a toothed member on one shaft and a toothedaxially slidable member on the other' IOO IIO

l shaft, planet gear wheels gearing the two members together and friction mechanism operated by the axial movement of the axially slidable member.

. 8. In mechanism such as described, the friction mechanism comprising an internally toothed member, friction lates mounted Within the member carrie by the web a gear Wheel Whose sleeve or boss projects into'` the toothed member and friction plates thereon c'o-operating with the first-mentioned friction plates.

9. In mechanism such friction mechanism comprisin an internally toothed member, pins secure as described, the i to the web of saidmember, friction plates loosely mounted on said pins,l member and through the plates mounted therein, a stop plate on said oss and h'ictio'n plates axiallymovable on the boss and altera' gear Wheel Whose boss or sleeve projects into the internally toothed nating withl the afore-mentioned friction v I plates.

In testimony that I claim the foregoing as .my invention, I have signed my. name 1n presence of t-Wo subscribing Witnesses.

GEORGE D. MUNSING. Witnesses:

Jos. D. EHUGnEs, WILLIAM' H. IiEsLrE.` 

